TM-9-2350-311-34-2

CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM

TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL

SEPTEMBER 1994

TM-9-2350-311-34-2 - Page 184 of 552

TM 9-2350-311-34-2

5-6

BREECHBLOCK ASSEMBLY - CONTINUED

b. Inspection and Repair

1

Inspect breechblock (1) for damaged threads. Repair threads or replace breechblock.

2

Measure breechblock (1) hole diameter (5). Replace if greater than 4.318 inches (10.968 cm).

3

Inspect gear segment (6) of breechblock (1). Replace breechblock if damaged or distorted.

4

Replace roller (4) if broken, cracked, if outside diameter is less than 0.995 inch (25.273 mm), or if inside di-

ameter is greater than 0.506 inch (12.852 mm).

5

Inspect headed straight pin (3). Replace if damaged or distorted.

6 Deleted.

c. Assembly

NOTE

If headed straight pin is new from supply, preform step 2.

1

Install roller (4) and headed straight pin (3) in breechblock (1).

2

Drill a 5/32 hole in the headed straight pin using the hole in the breechblock as a pilot hole. Ensure roller (4)

is free to turn and not bound.

3

Install new spring pin (2).

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